really need your help C++

I just started to study the C++ Programming Language. I'm done with the condition statements and jump statements. An idea came to my mind to create a simple program
that will determine if the input is a character or integer.
For example, the program asks you "How old are you?" and then you input a character (A-Z), the program will output "Your input is a Character."
Same as, if the program asks you "Choose a letter from A-Z" and then you input a integer (0-9), the program will output "Your input is a Integer."